Hoisting machine



June 13, 1944; M. B. MCLAUTHLIN 2,351,060

HOISTING MACHINE Filed Nov. 12, 1940 3 S1 e etsSheet 1 I INVENTOR. v

m zwww J1me 1944- M. B. MOLAUTHLIN I ,0

HOISTING MACHINE 5 Sheets-Sheet .2

Filed Nov. 12, 1940 June 13, 1 4- M. B. MQLAUTHLIN HOISTING MACHINE Filed Nov. 12, 1940 I s Sbeets-Sheet s BY 7 I 73. 771: INVENTOR' Patented June 13, 1944 resists UNE'E'EE STATES: i ATENT UFFECE 2,351,060 no s'rmo MACHINE Mame B.McLauthlin.MaldenQMass. Application'Ncvember 12, 1940, Serial No. 365,390

ciaim." (own-425) This invention relates to hoistingmachinesfor elevators and the like and it has for it'sobject to-improve the construction of machines ,ofthis class.

It is alsoan object of this invention to provide an improved self-contained hoisting machine unit which will occupy a minimum amount of space and wherein the parts are particularly constructed and arranged to provide for ready access to certain inclosed parts which periodically require attention.

To these ends I have provided an improved hoisting machine unit of the class described which, in its preferred form, may be constructed and organized as set forth in the following do scription, the novel features of the invention being particularly pointed out and defined in the claim at the close of said description.

In the accompanying drawings:

Figure 1 is a plan View of a hoisting machine unit constructed in accordance with this invention.

Figure 2 is a side elevation, partly in section, of-

the machine shown in Fig. 1.

Figure 3 is a section on line 33 of Fig. 2.

The illustrated embodiment of the invention is a self-contained unit comprising a frame including a base I!) made upon its top side with an upstanding hollow extension ii inclosing a worm l2 and worm gear l3 and also serving as a support for an electric motor I whosearmature shaft carries the worm ii.

The frame of motor i4 is bolted in position upon an obliquely disposed seat H provided at the top of extension ii directly above worm gear l3, and the armature shaft it of the motor extends obliquely downwardly therefrom into the housing extension H so that its axis is disposed at an acute angle relatively to a vertical line intersecting both the axis of gear 53 and the axis of said shaft as viewed in Fig. 2.

Armature shaft 115 is supported adjacent to the frame of the motor by a radial ball bearing l6, while the lower end of said shaft is rotatably supported by two opposed roller thrust bearings I1 and i8 which hold the shaft against endwise displacement in either direction.

The outer rings of the bearings ll and I8 are fitted within a flanged journal box i9 occupying a port or aperture 25 provided through a wall of extension H. A single inner ring or sleeve 2i serves for both bearings, said sleeve or ring being fastened in position on shaft l by nuts 22.

The outer end of box it is closed by a flanged cap or closure member 23 and the flanges of said member, and of journal box iii; are fastened together and to the wall of extension H by means of removable screws 24 extending through registering aperturesprovided in said flanges into tapped holes provided in said Well.-

The journal box unit i9 is disposed a substantial distance above the base ill of the frame of the machine and occupies an exposed position at one side of the housing extension ll so that it is conveniently accessible at all times and this is a distinct advantage in a machine of this type when the bearings 27 and it require attention, as frequently happens.

Another important advantage derived through the oblique disposition of the armature shaft i5 and the location of the frame of the motor at the upper end thereof, is that both the height and width of the space required for accommodation of the hoisting unit, as viewed in Fig. 2, is reduced to a minimum which is substantially less than that heretofore required.

The worm gear i3 is keyed to one end of a countershaft 25 rotatably supported by opposed roller thrust bearings 26 and 2's provided within housing extension I l. Keyed to the opposite end of counter-shaft 25 is a spur pinion 28 meshing with an internal gear 29 provided upon the interior of the rim of the usual cable drum so. This drum is rotatably supported by opposed roller thrust bearings 3i and 32 whose inner rings are mounted upon an arbor 33 fixedly supported at its opposite ends in sockets provided upon the frame of the machine.

The interior of housing extension ll provides a receptacle for a body of lubricating oil which is introduced through a filler pipe 3 5.

The brake mechanism which is ordinarily mounted upon the top of motor it is omitted from the drawings. The circuit of motor l4 and the operating devices therefor are also omitted from the drawings but may be as usual.

It is a feature of the above described construction that because of the oblique disposition of shaft it the worm i2 is disposed above the level of the oil within extension housing ll which is a distinct advantage when a high speed motor id is employed. Heretofore shaft l5 has been disposed vertically alongside of worm gear It with the result that the worm i2 was submerged in the oil and, when running at high speed, would pump or throw the latter upwardly necessitating the provision of a stuffing box between the worm and the motor It. This stuffing box required that the armature shaft be made in two parts connected by a coupling. The present invention disposes the worm above the level of the oil within the housing extension thereby avoiding the objectionable pumping action referred to, dispensing with the stuffing box and coupling, and permitting the armature shaft to be madein one piece.

Closely adjacent to the worm l 2 the interior of the housing extension I I is made with segmental ribs or bafiles Ilb so that any oil thrown against the interior of the housing extension will be directed back on to the worm by said ribs or baffles.

What I claim is: 7 g A hoisting machine of the class described comprising a frame including a supporting base made with an upstanding housing extension adapted to hold a fluid lubricant and having at its top an aperture surrounded by an inclined'motor seat; a horizontal countershaft journaled on said frame and having a portion thereof disposed within said housing extension; a worm gear fast on said portion and disposed within said housing extension directly below said seat with its lower portion submerged in said lubricant; an electric motor mounted on said inclined seat directly 25 above said worm gear with its armature shaft extending obliquely downwardly through said aperture at an acute angle away from a vertical line intersecting the axis of said worm gear and provided with a worm meshing with the top portion of said worm gear; a journal-box unit provided interiorly with opposed thrust bearings for rotatably supporting the lower end of said armature shaft and for holding the latter against endwise displacement in either direction, said journal-box unit being closed at its outer end, and means removably fastening said journal-box unit within an aperture provided in a side wall of said housing extension with its inner end above the level of the lubricant contained Within the latter and with its outer end a substantial distance above the base of said frame so that said journal-box unit occupies an exposed position at one side of said extension where it is accessible for removal and installation, said Worm gear operating' to transfer lubricant to said worm from which it flows downwardly under the influence of gravity along said armature shaft to said opposed thrust bearings.

MARTIN B. McLAUTHLIN. 

